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United States Patent | 5,324,268 |
Yoon | June 28, 1994 |
A retractable safety penetrating instrument with safety shield for introducing a portal sleeve into a cavity in the body includes a portal sleeve, a trocar disposed within the portal sleeve and a safety shield disposed between the portal sleeve and the trocar and having a distal end biased to protrude beyond a sharp distal end of the trocar. The trocar is supported in a manner to automatically move proximally from an extended position wherein the sharp distal end protrudes from the portal sleeve to a retracted position wherein the sharp distal end is protected within the retractable safety penetrating instrument in response to distal movement of the safety shield upon penetration into a cavity in the body. A retracting mechanism moves the trocar proximally and is normally locked in a position preventing proximal movement of the trocar and is released by distal movement of an operating member to trigger retraction of the trocar.
Inventors: | Yoon; InBae (2101 Highland Ridge Dr., Phoenix, MD 21131) |
Appl. No.: | 808325 |
Filed: | December 16, 1991 |
Current U.S. Class: | 604/158 |
Intern'l Class: | A61M 005/178 |
Field of Search: | 604/164,167,93,110,198,158 |
Re32922 | May., 1989 | Levin et al. | |
1527291 | Feb., 1925 | Zorraquin. | |
2496111 | Jan., 1950 | Turkel. | |
2623521 | Dec., 1952 | Shaw. | |
2630803 | Mar., 1953 | Baran. | |
4254762 | Mar., 1981 | Yoon. | |
4345589 | Aug., 1982 | Hiltebrandt. | |
4442836 | Apr., 1984 | Meinecke et al. | |
4488545 | Dec., 1984 | Shen. | |
4503856 | Mar., 1985 | Cornell et al. | |
4535773 | Aug., 1985 | Yoon. | |
4559041 | Dec., 1985 | Razi. | |
4601710 | Jul., 1986 | Moll. | |
4627841 | Dec., 1986 | Dorr. | |
4654030 | Mar., 1987 | Moll et al. | |
4670008 | Jun., 1987 | Von Albertini. | |
4677979 | Jul., 1987 | Burns. | |
4747831 | May., 1988 | Kulli. | |
4817603 | Apr., 1989 | Turner et al. | |
4820275 | Apr., 1989 | Haber et al. | |
4869717 | Sep., 1989 | Adair. | |
4889117 | Dec., 1989 | Stevens. | |
4900307 | Feb., 1990 | Kulli. | |
4902280 | Feb., 1990 | Lander. | |
4906236 | Mar., 1990 | Alberts et al. | |
4931042 | Jun., 1990 | Holmes et al. | 604/164. |
4943280 | Jul., 1990 | Lander. | |
4946446 | Aug., 1990 | Vadher. | |
4955870 | Sep., 1990 | Ridderheim et al. | |
4966593 | Oct., 1990 | Lennox. | |
4973316 | Nov., 1990 | Dysarz. | |
4994042 | Feb., 1991 | Vadher. | |
4994068 | Feb., 1991 | Hufnagle. | |
5024665 | Jun., 1991 | Kaufman. | |
5026388 | Jun., 1991 | Inqaiz. | |
5030206 | Jul., 1991 | Lander | 606/185. |
5053016 | Oct., 1991 | Lander. | |
5061251 | Oct., 1991 | Juhasz. | |
5066288 | Nov., 1991 | Deniega et al. | 604/274. |
5104382 | Apr., 1992 | Brinkerhoff et al. | |
5104383 | Apr., 1992 | Shichman | 604/167. |
5114407 | May., 1992 | Burbank | 604/164. |
5116353 | May., 1992 | Green. | |
5127909 | Jul., 1992 | Shichman. | |
5152754 | Oct., 1952 | Plyley et al. | |
5158552 | Oct., 1992 | Borgia et al. | |
Foreign Patent Documents | |||
2544262 | Apr., 1977 | DE. | |
1435246 | Nov., 1988 | SU. |